Sealed padlock



Feb. 14 1928.

' v w. KROLL SEALED PADLOCK Filed July 1, 1925 Tao proved sealedpadlock, showing UNITED STATES PATENT OFFICE.

VVALDEMAR KROLL, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR, BY MESNE AS-SIGNMENTS, TO

THE YALE & TOWNE. MANUFACTURING COMPANY, OF STAMFORD,

CONNECTICUT, A CORPORATION OF CONNECTICUT.

SEALED PADLOCK. I

Application filed July 1, 1925 Serial No. 40,867..

One object of my invention is to provide a padlock with a seal that willclose the key opening in the lock, the lock being so designed that thekey cannot be withdrawn from the lock until the shackle of the lock isclosed and is engaged by the bolt.

Another object of the invention is to prevent the opening of the lockand the withdrawal of the key and the appliance of the seal to the openlock. 7

In the accompanying drawings:

Fig. 1 is a perspective view of my imposition and the shackle closed;

Fig. 2 is a sectional view of a lock to which my invention is applied;the shackle being open; and

Fig. 3 is an end view of the lock partly broken away.

My invention is used in connection with a lock. for which patent wasgranted to Frank Soley April. 26, 1910, N0.'956,213.

Referring to the drawings, 1 is the casing of the lock. 2 is theshackle, which is pivoted to the casing at 3. 4 is a key pin. 5

is a bolt for engagingthe nose of the shackle.

6 is a sliding member, which has an extension 7 that encircles the keypin 4. The key 8 is mounted on the pin 4, as shown in Fig. 3, and whenthe shackle is in the open position, as illustrated in Figs. 2 and 3, itis held within the lock by the encircling member 7. The key cannot beremoved until the shackle 2 is closed and the bolt 5 is'in engagementtherewith. When the parts are in this position, the encircling member ismoved clear of the key so that the key can be withdrawn clear ofthelock;

the seal in broken so that the proper key can be in- Encircling the keopenin of the padlock is a plate 10, which has a ey opening 11 40 thatcoincides with the opening in the body of the lock. In this plate is achannel 12 for the passage of the sealing strip 13. This sealing stripextends around the body of the lock, as illustrated in Fig. 1, and thetwo ends of the strip are united by a seal 14. This sealing strip closesthe key opening in the lock and prevents the manipulation of the .lockby a key. or by a picking instrument. i

In order to open the lock, the seal must be serted in the lock. Afterthe key is inserted and the shackle is disengaged from the lockingmechanism, the key 1s retained in the 5 lock .until the shackle is againclosed and locked. This prevents the sealing of the lock until theshackle is closed and locked and also prevents the withdrawal of the keyand the appliance of the seal to the-open lock. 'All tampering with thelock is absolutely impossible, as the lock must be closed before theseal can be applied.

I claim:

In a padlock, the combination with a casing having a key openingtherein, of a shackle; a plate permanently attached to or forming partof the casing and encircling the key opening of the lock, said platehaving a key opening coinciding with'the key

